!!Urgent,Need Help and Info!!

......Here goes...i have been downloading Op Systems (Vista,Xp SP2,SP3) off the internet from various torrent sites,they are fully functional however my issue is when i burn them on DvDs they don't boot from start up....i don't know what im missing or what i didn't do correctly on burning these Op Systems,Pls Help...I've tried setting boot settings DVD-Rom at 1st boot...however it still goes pass boot from DVD/Cd...or that doesn't show at all.....

Your DVD writing software will have a setting to make a disk bootable. If you don't know how, look through the menus, RTFM, Google it etc; it may even be that you need to use some other software if Power ISO doesn't have that ability (Nero's pretty good).

BUT...if the ISO isn't bootable then you're stuffed. An ISO is just a disk image so you will need to get a bootable ISO file or find out some way of modifying an ISO to make it bootable.

When you wrote the ISO to the disk did you write it as a file or as a disk image? To find out, pop the disk in the drive and open it with Explorer. If you see the ISO file then you wrote it as a file (wrong!), but if you see the ISO file contents then you correctly wrote it as an image. If you write a bootable disk with the ISO file then that won't work.